GREENWICH, Conn. -- A Greenwich man is working to help baby eels making their annual migration from Long Island Sound to rivers across Connecticut, according to WNPR News.

Joe Cassone said adult eels go out to sea to spawn and juvenile eels must make their way back up rivers into Greenwich, but thousands get caught in dams on their way back, according to the report.

Cassone told WNPR News that he collected hundreds last year and hopes to collect thousands this year.

There are 43 dams on Greenwich's Byram River, according to the report. The juvenile eels have been known to climb a 40-foot dam wall, but many cannot, Cassone told WNPR News.

"Trying to climb over a dam like this, the flow is obviously so strong it'll knock them down," Cassone said in the WNPR News report. "So they end up piling up down below. There's almost a logjam of eels below the first dam."